A sudden stop of the refrigerator compressor Biryusa often becomes an unpleasant surprise, especially when food in the chamber begins to deteriorate. In most cases, the reason lies not in a burnt-out motor, but in the failure of the start-up relay - a small but critically important unit. It is this element that is responsible for starting the engine and protecting it from overcurrents.
Independent replacement of this part allows you to save a significant amount on calling a technician, since the process does not require complex specialized equipment. However, in order to connect the relay of the Biryusa refrigerator correctly, it is necessary to strictly follow the sequence of actions and safety precautions. Installation errors can lead to re-burning of the part or even damage to the compressor windings.
In this article we will analyze in detail the algorithm for diagnosing, selecting and installing a new trigger. You will learn how to distinguish a serviceable part from a burnt one, what connection nuances exist for different models and what to pay special attention to when assembling the unit.
Diagnostics and signs of a faulty start relay
The first sign of what is required relay replacementis the characteristic behavior of the refrigerator when plugged into the network. The compressor may try to start, make a humming or clicking noise, but stop after a few seconds. Often this process is accompanied by a sound reminiscent of the sound of a dropped metal spoon, which indicates the fall of the internal core.
If you hear frequent clicks at intervals of several seconds or minutes, this is a sure signal that the thermal protection is triggered due to the inability to start the engine. In some cases, the motor hums, but does not start at all, which may indicate jammed contacts or a broken circuit inside the plastic body of the part.
For an accurate diagnosis, it is necessary to remove the element and conduct a visual inspection. Shake the part near your ear: if you hear a knock inside, it means the mechanical part is destroyed. Also pay attention to the condition of the contacts: the presence of soot, melting or a characteristic burning smell clearly indicates the need for replacement.
⚠️ Attention: If after replacing the relay the compressor hums, but does not start, and at the same time gets very hot, immediately turn off the refrigerator. Perhaps the problem is not in the relay, but in the interturn short circuit of the windings or jamming of the piston group.
Do not ignore the primary symptoms, since long-term operation of the engine in frequent start-stop mode leads to overheating of the windings. Start relay - this is a consumable material that wears out over time, and its timely replacement prolongs the life of the entire unit.
Selection of a compatible part for the Biryusa model
Refrigerators Biryusa are equipped with compressors from various manufacturers, including domestic ones Atlant, Italian Danfoss (now Secop) or Chinese analogues. Therefore, there is no universal solution, and you need to select a new part strictly according to the markings indicated on the body of the old device.
The most common relays found in these refrigerators are the RTK, RKT, RTP series relays or more modern analogs of the 17.5x25.5 mm type. An important parameter is the type of compressor: for single-phase motors induction relays are used, and for two-phase motors - with an additional capacitor.
- 🔌 RTK-1, RTK-1-3 - classic models for SK series compressors, often installed in old Biryusa models.
- 🔌 RKT - more compact options, often compatible with Atlant engines, requiring an exact match of the landing dimensions.
- 🔌 PTC relay - modern posistor options that do not have moving parts, are characterized by increased reliability and quiet operation.
Upon purchase pay attention to the number and location of contacts. The standard circuit assumes the presence of three main terminals, but their geometry may differ. If you are not sure of compatibility, it is better to remove the old part and take it with you to the store or compare photographs with the product in the online catalog.
⚠️ Attention: Do not try to install a relay from another type of compressor (for example, from Danfoss to Atlant) without checking the electrical circuit. Different resistance of the windings can lead to instant failure of the new part.
The quality of the contact group directly affects the service life. Cheap Chinese analogues may work unstably, so it is recommended to choose products from trusted brands or original spare parts recommended by the refrigerator manufacturer.
Tools and safety measures before starting work
Before you start refrigerator repairit is necessary to ensure safe working conditions. Electric current and refrigerant are potential hazards and should not be ignored. All work is carried out exclusively on de-energized equipment.
You will need a minimum set of tools that any home craftsman can find in his home. Pay special attention to the cleanliness of the workplace and hands, since the penetration of moisture or dirt into the electrical part of the compressor is strictly prohibited.
- 🛠️ Pliers or pliers for removing the fixing brackets.
- 🛠️ Screwdriver (Phillips or flat) for removing the protective covers.
- 🛠️ Multimeter for checking the integrity of the windings and relay contacts.
- 🛠️ Dry rags for wiping contacts and removing dust.
Be sure to unplug the refrigerator and move it away from the wall to provide access to the back. If the unit has just been running, allow the compressor to cool for 15-20 minutes to avoid getting burned and to reduce the pressure in the system.
⚠️ Attention: It is strictly forbidden to cut through the copper pipes of the cooling system or try to refill the refrigerator with refrigerant yourself. Work is carried out only on the electrical part.
Check the voltage in the network using a multimeter if you suspect unstable operation of the electrical network. Voltage surges often cause burnout of the starting equipment, and installing a new relay without a stabilizer can lead to repeated failure.
Removing the old relay and preparing the compressor
The process of removing the faulty part begins with dismantling the protective casing located at the bottom of the rear wall of the refrigerator. Usually it is attached to latches or screws, which must be carefully unscrewed or pressed out.
After removing the casing, you will see a compressor with a relay box attached to its rod. Depending on the model, it can be fixed with a spring clip, plastic latches, or simply held in place due to the tight fit on the terminals.
Carefully remove the retaining clip, if any, and pull the relay down. Do not use excessive force to avoid damaging the compressor's copper leads, which can be brittle from time and temperature. If the part fits tightly, rock it slightly from side to side.
Disconnect the power wires leading to the relay. Before doing this, it is recommended to photograph the connection diagram or sketch it, so that when installing a new part you do not confuse phase and zero. In some models, the wires can be crimped into common terminals.
☑️ Preparation for replacement
Inspect the seat on the compressor. There should be no traces of moisture, oxides or soot. If necessary, clean the contacts on the compressor terminals with fine sandpaper or alcohol, ensuring reliable electrical contact.
Connection diagram and installation of a new relay
Installation of a new one start relay requires attention to the orientation of the part. The body usually has a "UP" marking or an arrow indicating the up position. Incorrect orientation will result in the mechanism not working or working incorrectly.
Place the relay onto the compressor terminals until it stops. It should fit tightly and not wobble. After this, connect the power wires to the appropriate terminals, focusing on the photographs taken earlier or the markings on the case (L - phase, N - zero).
The table below will help you understand the typical terminal markings on the compressor and relay:
| Designation | Function | Wire color (typical) | Where to connect |
|---|---|---|---|
| C or R | Working winding | Red / White | Main contact of the relay |
| S | Start winding | Black / Green | Side contact of the relay |
| L | Phase (Line) | Brown / White | Power input |
| N | Zero (Neutral) | Blue | Power input |
After connecting the electrical part, put it in place a retaining bracket or bar that presses the relay to the compressor housing. This is an important step, since vibrations during operation can disrupt contact if the part is not fixed.
⚠️ Attention: Make sure that the wires do not touch the compressor housing or the cooling system pipes. Vibration can grind the insulation, which will lead to a short circuit to the housing.
If your model has a capacitor connected, check its condition. A swollen or leaking capacitor also requires replacement, otherwise the new relay may quickly fail.
Checking functionality and first start
After assembling all the elements, you can begin a test run. Do not rush to close the back cover completely - leave access for visual control and listening to the operation of the motor.
Plug in the refrigerator. A working unit should start with a characteristic beep, which after 1-3 seconds should turn into a smooth working hum. If you only hear clicks or the humming stops, immediately turn off the power.
Check the heating of the relay housing after 10-15 minutes of operation. It can be warm, but it should not heat up to a temperature at which it is impossible to touch it with your hand. Also evaluate the operation of the refrigerator compartment: after 30-40 minutes it should become noticeably colder.
Make sure that vibration from the running compressor is not transmitted to the pipes or body of the refrigerator. If necessary, place rubber pads under the legs of the unit or adjust their height.
If everything went well, install the protective cover in place and secure it. Now your refrigerator Biryusa is ready to work again and keep food fresh.
Frequent errors and operating recommendations
One of the most common mistakes is installing a relay of the wrong model “by eye.” Even if the contacts match, the internal characteristics (operation current, opening time) may differ, which will lead to unstable operation.
Also, craftsmen often forget about the cleanliness of the contacts. Oxides and carbon deposits create additional resistance, causing heating and sparking. Always take the time to clean the contact pads before installing a new part.
- 🚫 Do not use relays from other refrigerator models without checking the parameters.
- 🚫 Do not ignore the condition of the capacitor, if it is provided for in the circuit.
- 🚫 Do not leave wires dangling next to hot tubes compressor.
Regularly clean the back of the refrigerator from dust and pet hair. A condenser clogged with dust (black grille at the back) impairs heat transfer, forcing the compressor to work longer and more intensely, which reduces the life of the relay.
Is it possible to restore an old relay?
Theoretically, you can try to clean the contacts inside the relay or replace the posistor, but practice shows that this is a temporary measure. It is cheaper and more reliable to buy a new part than to risk a burned out compressor.
Following these simple rules will allow you to avoid repeated breakdowns and ensure long and reliable service of your refrigeration equipment.
How to understand that the relay has burned out if you do not have a multimeter?
Visually: presence of soot, melted plastic, burning smell. By ear: when turned on, only one click and a buzz are heard, but there is no startup, or frequent clicks every few seconds. Shaking: you can hear the ringing of a fallen internal part.
Is it possible to start the Biryusa refrigerator without a relay?
You can start it for a short time by applying voltage directly to the working winding, and to the starting winding - through a button or manually for 1-2 seconds. However, this is dangerous and requires skill. It is strictly forbidden to leave the refrigerator operating without a protective relay - the motor will burn out if it jams.
Why does the new relay get hot?
Slight heating up to 50-60 degrees is normal. Strong heating can be caused by poor contact at the terminals, incorrect relay model, malfunction of the compressor itself (turn-to-turn short circuit) or low voltage in the network.
Where can you find the relay markings on the Biryusa refrigerator?
The markings are applied directly to the black plastic case, which is placed on the terminals of the compressor. Also, the information can be duplicated on a sticker inside the refrigerator compartment or in the technical data sheet of the device.
How much does it cost to replace a relay in the service?
The cost consists of the price of the part itself (from 300 to 1500 rubles depending on the model) and the work of the technician. Self-replacement allows you to save on the cost of call and work, which often exceeds the price of the spare part.